Selective signaling system.



UNITED STATES Pn- TENT OFFICE;

EDWIN R. GILL, OF YONKERS, NEW YORK, ASSIGNOR, BY MESNE-LSSIGNKENTS, TOHOWARD E. MERRELL, OF NEW YORK, N. Y., AND OR-LO J. HAMLIN, F SHETHPQRT,

PENNSYLVANIA.

v Specification of Letters 1mm. Application filed December 8, 1809.Serial No. 582,082 z To all whom it may concern:

Be it known that I, EDWIN R. GILL, a citizen of the United States,residing in the city of Yonkers, county [of Westchester, and State ofNew York, have invented a certain new and useful Improvement inSelective Signaling Systems, of which the following is a specification.

I This invention relates to signaling sys tems, and more particularly tosuchsystems as are adaptable to telephonic train despatching circuits.

- One of the objects of the present invention is to provide a convenientmethod of communicating the correct time simultaneously to variousdespatchers along a tele phone train despatching circuit.

Another object is to provide means whereby signals arranged in atelephonic despatching circuit may be operated. in consonance withelectrical impulses impressed.

upon a telegraph circuit from-the National Observatory or other sendingstation, thereby enabling the tiine piece of each. despatche-r to beperiodically standardized. I

Other objects will bein part-obvious-and in part pointed outhereinafter.

The invention accordingly consists in the features ofconstruction,combinations of elements and arrangement'of parts, whichwillbe exemplified in the construction herelnafter described, and thescope of the application of which will be indicated in the followingclaims.

In the accompanying drawings wherein: are illustrated twoforms ofembodiments of.

my invention, the figure is a diagrammatic view of a preferred formthemof'.

- Similar reference characters refer to simi 0 local circuit 26 mayinclude a 0011 34 lar parts in both figures of the'drawingl.

Referring nowfto the drawings, the view may be said to illustratediagrammatically thesignaling apparatus, wiring and operating device inthe principal train despatchers station as well. as receiving stationsof a telephonic train despatehers circuit, said stagitps beingdesignated, respectively, A, B an 1and2 respectively, denote oppositesides ofthe maintelephone line, and connected in bridge thereofis'imlicated at'3, 4. and 5 are telephones 6, 7, and 8. Calling devicesfor the various telephones along the line. are provided in-each of thestations, said calling devices in the present instance comp-rising ingconnected with the terminal 20. Magnet- SELECTIVE SIGNALING SYSTEM.

magnetos 10, 11 and 1 2, each magneto being located in a normally openbridge of the telephone line, said bridges being indicated at 13, 14 and15. 1

The signaling devices and other operating mechanism in each of thereceiving -stations being similar,.but one set thereof need be describedin order to; impart a clear understanding of the present invention,

Leading from wire 1 of the telephore line is a wire 16 which connectswith one terminal of the coil 17 positioned upon one leg of the magnet,the yoke of which is shown at 18, and leading from the otherterminal ofsaid coil is a wire 19. This wire-leads to a terminal 20 of theselector," illustrated diagrammatically at 21,. This selector which ispreferably a structure such as is described in Letters Patent, No.906,523 issued to me December 15, 1908, includes a magnet- 22 and a coil23 on said magnet, the latter be- 22 is adapted td-operate r'neclnanismnot shown) which causes a contact member 24 to. engage an opposedcontactlmelnber 25 and .close localcirc'uit 26. Included in localcircuit 26, in the present instance, is a bat tery 27 and a signal 28which signal may take the form of an ordinary electric bell. Coil 2 3 isconnected with the terminal '30 of the selector, and from this terminalleads a wire-31 to'the terminalof a coil 32 positioned upon the otherleg of the magnet 18. From the'opposite terminal of this coil-leads awire 33 to the opposite side 2' of the telephone line. It will thus beseen that the coils 17 and 32 of the magnet'l8 as well -.as

selector 21 are connected in bridge of thetelephone line. If desired, aportion of the I positioned upon magnet 22 so that when the localcircuit 26 is closed by the selector 21 an line, the eficct of whichwill be a buzzing in the various telephone receivers along the telephoneline. This buzzing, which constitiites an answer back signal, willinform the operator that the local signal operating circuit has beenclosed by the operation of the selector.

induced current willbe set up in themain 35 denotes a polarized armaturewhich co operates with the poles 36, 37 of the magnet 18. Armature 85 isprovided with a cla per 38 which is adapted to co-act withithe 40, 41 tosound a signal.-

lie 1,

42 indicates a relay comprising coils 43 l ated by impulses impressedupon the teleand' an armature 44. The COllS 43 of this relay areincludedin a local circuit 45 which is provided with the battery 46, andineluded in'this local circuit is a sender key 47 having operating keys48. These keys, when operated, actuate mechanism (not shown) to impressimpulses of a predetermined character upon the local circuit 45, therebyoperating the relay 42.

50 and 51 indicate the opposite sides of the telegraph line, which leadinto the train despatchers station. These wires include a coil 52 of arelay having an armature Armature 54 is normally urged to movement in anupward direction as by means of. the retractile spring 55 connectedthereto at'56 with the fixed support 57. Contact members 58 and 60extend through an insulating block 61 carried by the armature The upperends of said contact members are adapted to cooperate respectively withopposed contact members 62 and 63 which are insulated from each other asby means of the block 64. The lower ends of contact members 58 and 60are adapted to cooperate respectively with opposed contact members 65and- 66 which also insulated from each other as by means of the block67., A wire 68 leads from the positive'side of the battery 70 to thecontact member 58 and a wire 71 leads from the contact member 60 to thenegative side of the battery 7 0. Contact members 62 and 66 areconnected as by the wires 72 and 73, and contact members 63 and 65 areconnected as by means of the wires 74 and 75. A wire 76 leads from thepoint of jointure of wires 74 and 75 to the side A of the telephone lineand included in 4 this wire is a retardation or choke coil 77.

78 indicates a choke coil included in a wire 80 which leads from theside 2 of the telephone line to a wire 81. the latter being connectedwith a terminal 82 of a switch 83 and a wire 84 leads from the otherterminal 85 of the switch to the point of jointure of wire 72 and 73. acondenser 85 being interposed between the point of ointure of wires and81 and the side 1 of the telephone tline. A wire 86 leads from theopposed contact 87 of the armature 44 ot the relay 49 to a terminal 88of therelay. and from this terminal a wire 90 leads to the wire 84.-i.'lhe armature 44 of the relay 42 is connected with wire 81- as bymeans of the wire 91.

Having thus described this embodiment of my invention, the operationthereof may now be understood. When the switch arm 83 is in the positionshown in the drawing, the system is put into such condition that thevarious polarized signals along the line may be operated by impulsesimpressed upon thetelephone line by the battery 70 in accordance withthe operation of the relay.

53. This relay, as above described, is operupper side 45 and relay 42,cause battery graph line, the sides of which are indicated at 50 and 51.The impulses which are sent over the telegraph line are impressedthereon from the National Observatory at a predetermined time, theobject of the invention asabove stated being to enable the time piecesof the various operators along the line to be periodically standardized.

It will be understood that during the impression of the impulses uponthe telegraph line, the armature 54 of relay 53 will oscillate betweenthe opposed sets of contacts. Assuming the armature 54 to be in theposition shown in the drawings, impulses will be impressed upon thetelephone line from the battery 70 to actuate the polarized signalsaccording to the following circuit: wire 68, contact member 58, contactmember 65, wire 75, wire 76, impedance coil 77 to the side 1 of thetelephone line, thence through wire 16, then through coil 17 wire 19,coil 23, wire 31, coil 32, wire 33 to the opposite side 2 of thetelephone line, thence through wire 80, impedance coil 78, wire 81,switch arm 83, wire 84, wire 73', contact member 66, contact member 60and wire 71 to the opposite side of the battery 70. \Vhen the armature54 is in engagement with the of contact members 62 and 63, impulses areimpressed upon the telephone line to actuate the polarized signalsthrough the following circuit: wire 68, contact member 58, contactmember 62, wire 72, wire 84.

switch arm 83,,wire 81, impedance coil 78,

wire 80 to the side 2 of the telephone line,

whence they passin an opposite direction through the various apparatusin bridge thereof,- thence they return through side 1 and throughimpedance 'coil 77, wire 76, wire 74, contact member 63, contact member60 and wire 71 to the negative side of the battery. Thus it will be seenthat the oscillatory movements ot'the relay will close such circuits aswill enable battery 70 to impress impulsesalternately in oppositedirections to the telephone line, whereby the polarized armatures of thevarious receiving instruments will be actuated in consonance with theimpulses impressed upon the telegraph line from the NationalObservatory.

When it is-desired to set the system for selective signaling; the switcharm 83 is moved to the position shown in dot-ted linest and. assumingthe armature 54 to be in the position shown, the manipulation of any ofthe sender keys 48 will. through local circuitto impress impulses uponthe line according, to the tollowing circuit: from battery 70 throughwire 68 to contact member 58.thence through contact member 65, wire 75,wire 76, coil 77 to the side 1 of the telephone line, then through wire16 to the coils of the polarized signal apparatus and, the coil 23 ofthe coil 78, wire 81, wire 91.to the armature at of the relay 42,thence'through wire '86, wire 90, wire 73, contact member 66', contactmember 60 and wire 71 to the opposite side of the battery 70. It will beunderstoodthat a similar circuit, but in anopposltedirection will beimpressed upon the telephone when the armature 54 occupiesits normalposition with contacb members 58' and 60 in engagement withcbntiictmembers 62 and 63. Upon the iiiipressio'ii of impnlses of'apredetermined character upon the last described circu'it, the localcircuits. 26 in the particular station called' Willi be elosetl "by theengagement of-the opposed-contacts 24 1 line, and-a pole chang'ing relayactuated by and 25, through the action of the selector.

When. it is desired to call the various tele l' phones in the receivingstations or the one in thecalling station, such operationlmaybepeffccted as by means of the magnetos 10,11

and 12 which as above described are in a normally open bridge ofthe'telephone line. It, will accordingly be-seen that I have provided animproved signaling systemadapted to attain among others all theends andob eots' pointed out in an exceedingly simple yet elticient manner.

As many changes could be made in the above construction and manyapparently widely dilferent embodiments of this invention could be made'withoutvtleparting from' the scope thereof. it is intended that allmatter contained in the above description or shownin the accompanyingdrawing shall be interpreted as illustrative and not in a limitingsense. It is also to be understood that the language used in the.following claims is intended to cover all of the generic and sixeificfeatures of the invention herein described and all statements of thescope of the invention. which as a matter of language, inightbe said tofall therebetwcen.

Having described my invention what I claim as new and desire to secureby Letters Patent is:

1. In a signaling svsteuu in combination, a telephone line. a polarizedsignaling device in bridge of said line. current suppl ing means in saidline, a telegraph line. and

means actuated by impulses impressed upon said telegraph line forapplying said current supplying means to said telephone. line so thatthe current w ll flow therethrough alternately in' opposite directions.

2. In a signaling system, in combination, a telephone line. a polarizedsignaling device in lu'idge of said line. a battery adapt: ed to beapplied to said telephone line. a telegraph line. and' a currentreversing relay actuated by impulses impressed upon the telegraph linefor applying said battery to said telephone line. whereby said signalingdevice will be actuated in consonance with the impulses, impressed uponthe telezgraphline. y

' 3. In a signaling system, in combination, a telephone line, apolarized signaling derice in bridge of the same, current supplyingmeans adapted to be-connected with.

impulses impressed-upon the telegraph line --for applying said batteryto saidtelephone line.

ln'a signaling system, in combination, I

a telephone line, a polarized signaling device in bridge of said line, aselector in said: bridge,"a local circuit including a battery=and asignaling device adapted to be closed by'said selector, a batteryadapted to be applied -to said telephone line, a relay adapted to applythe battery to said line, a

local circuit including a sender key for op- 4 crating said relay, atelegraph line, a relay,

actuated by impulses impressedupon the telegraph line for applying saidbattery to polarity-of said battery with respect to the line, and meansfor rendering said first mentioned relay ineffective. I

6. A signaling system comprising a calling station and a plurality ofreceiving staltions disposed along a telephone line, a polarizedsignaling device inbridge of the telephone line located in each of thereceiv-' ing stations, a. battery adapted to be ap- 'plied to thetelephone line, and a telegraphicall y operated pole changing relaylocated in the-calling station adapted to apply said battery to saidtelephone line. 7. A signaling system comprising a calling station and aplurality of receiving stations disposed along a telephone line, aselectirely operated signal in each of the receiving stations, means inthe. calling sta tion for selectively calling said receiving stations, apolarized signal in each of the re relying stations, a battery adaptedto be applied to. the telephone line, and a pole changing relay adaptedto be actuated by impulses impressed upon the telegraph line "forapplying said battery to said telephone line whereby said polarizedsignaling device will be operated simultaneously and in consonancewiththe impulses impressed upon the telegraph line.

100 said line and for alternately reversing the v 'i S. A signalingsystem comprising a calling station and one or more receiving stationsdisposed along a telephone line, a selector in each of the receivingstations connected in bridge of the telephone line, a lceal circuitcomprising a battery and a sig' nal adapted to be closed by eachselector, a polarized signaling device in each of the receiving devicesand connected in bridge of the telephone line, a telephone in .each ofsaid stations, means in each of said stations in a normally open bridgeof theline for operating the calling means of the telephones in each ofthe other stations, means in the calling stations for operating theselector in each of the receiving stations, a battery adapted to beapplied to the telephone line, a telegraph line, and a relay actuated byimpulses impressed upon the telegraph line for applying said battery tosaid telephone line and for alternately reversing the polarthe telegraphline.

10. In a signaling system, in combination, a telephone line, a polarizedsignaling device in bridge of the same, a local circuit connected acrosssaid telephone line, current supplying means in said local circuit, amain telegraph line, and a relay interposed between said local circuitand said telegraph line adapted to be operated by electrical impulsesimpressed upon the telegraph line whereby said polarized signal will beoperated.

11. In a signaling system, in combination, a telephone line, a polarizedsignaling device in bridge of the same, a local circuit connected acrosssaid line, current supplying means in said local circuit, a maintelegraph line, a relay interposed between said local circuit and saidtelegraph line and adapted to be operated by electrical impulsesimpressed upon the latter, and means in said local circuit forimpressingcurrent in opposite directions -therein when said relay is operated,thereby operating said polarized signaling device.

12-. In a signaling system, n combination,

a telephone line, a polarized signaling device in bridge of the same, alocal circuit connected across said line, current supplying -means insaid local circuit, a main telegraph line, a relay interposed betweensaid local circuit and said telegraph line and adapted to be operated byelectrical impulses impressed upon the latter, and meansin' said localcircult for impressing current in opposite directions thereinwhensaid-re lay is operated, thereby operating said polarized Signalingdevice, the direction in which the current is impressed on-said localcircuit being determined by the position of the armature of said 'relayrelative toits contacts.

13. In a signaling system, in combination, a telephoneline, a signalingdevice in bridge of said line, a telegraph line, a local circuitconnected to opposite sides of the telephone line, a relay in said localcircuit adapted to beopepated by electrical impulses impressed on thetelegraph line, and means in said .local circuit adapted, when saidrelay is operated, to actuate said signaling devise in consonance withthe impulses impressed on the telegraph line.

14. In a signaling system, in combination, a telephone line, a selectivesignalin device in bridge of said line, a second signa ling device insaid bridge, a plurality of local circuits connected to opposite sidesof said telephone line, a common source of current supply for said localcircuits, a local circuit including a source of current supply and asender key, a relay operated by impulses impressed upon said last namedlocal circuit adapted to close one of saidfirst named local circuitswhereby said selective signaling device will be actuated, a telegraphline, a relay in the other of said first named local circuits adapted tobe operated by electrical impulses impressed upon the telegraph line,and means in said last mentioned circuit for impressing current thereonconsonantly with the impression of impulses on the telegraph linewhereby said second signaling device will be operated.

15. In a signaling system, in combination, a telephone line, a selectivesignaling apparatus in bridge of the line, a polarized signalingapparatus in said bridge, a plurality of local circuits connected toopposite sides of the telephone line, each of said local circuits beingprovided with a source of current supply, means for closing one of saidlocal circuits whereby said selective signaling apparatus will-beoperated, means for' closing the other of said local circuitsgand meansin said last named circuit for impressing currents alternatelyin-opposite directions therein whereby said polarized signaling devicewill be operated.

16. In a signaling system in combination, I

a telephone line. a selective signaling device in bridge said hne, asecond signaling derice in sai, bridge, a plurality of local circuitshaving a common connection to oppo- 'site sides of said telephone line,a source of;

current supply common to said local circuits,

:1 local circuit including a source of eur-.

rent supply and a sender key, a relay erated by impulses impressed uponsaid'last named circuit adapted to close one of said first named localcircuits whereby ,said selective signaling device will be actuated, atelegraph line, a relay in the other of said first named local'circuitsadapted to be operated by electrical impulses impressed upon thetelegraph line, and means in said last mentioned circuit for impressingcurrent therein in opposite directions consonantly with the impressionof impulse-soon the telegraph line, whereby said second signaling devicewill be operated.

17 In a signaling system, in combination, a telephone line, selectivesignaling apparatus in bridge of-the line, a polarized signalingapparatus in said bridge a plurality of local circuits having a commonconnection with opposite sides of the telephone line, a source ofcurrent supply common to pedance means in said last mentioned localcircuit, a telegraph line, and means actuated by impulses impressedupon.the telegraph line for causing impulses to be impressed alternately inopposite directions uponitlie other of said local circuits Whereby saidpolarized signaling device Will be operated. j

In testimony whereof I have hereunto aflixed my signature in thepresence of two Witnesses.

. EDWIN it. GILL. Witnesses:

FRANK J. KENT, B. W. CoULnocK.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

